Miner&#39;s safety-lamp.



W. BEST.

\ MINERS SAFETY LAMP.

APPLICATION FILED DEC. 1, 19l5.

1,176A23. Patented Mar. '21, 1916.

Fig-1 0100 OOOQQOO) THE COLUMBIA PumoGRAPH C0,. WASHINGTON, D. c.

i srarzs WILLIAMBEST, or MORLEY, NEAR LEEDS, ENGLAND.

MINERS SAFETY-LAMP.

Specification of Letters Patent.

Patented Mar. 21, 1916.

Application filed December 1,1915. Serial No. 64,422.

To all whom it may concern:

' Be it known that l, \VILLIAM BEST, a subject of the King of Great Britain, residing at Morley, near Leeds, in the county of York, England, have invented certain new.

the lamp frame is fitted with a cylindrical metallic shield or bonnet inclosing the lamp gauze or gauzes, it is found that the heat generated within the lamp has the effect of causing the lamp bonnet to become so hot as to render it incapable of being taken hold of bythe hand, while the suspending or carrying hook of the lamp situated in the roof of the bonnet also becomes heated through the same cause to such an extent as to be uncomfortable to handle.

Now the object of this present invention is to provide means in connection with miners safety lamps of the kind specified, whereby the upper body portion of the lampand also its carrying hook shall be rendered capable of being taken hold of by the hand without discomfort to the user. 7

According to my invention, I'provide out side the ordinary bonnet of the lamp a sec ond or'supplementary bonnet of such an increased diameter'as to leave between itself and the inner bonnet an annular space extending throughout the entire depth of the latter, while the outer bonnet is left open top and bottom so as to allow atmospheric air to circulate freely through the space between the said inner and outer bonnets by which the outer bonnet itself is always kept perfectly cool and so rendered capable of being handled without discomfort; while between the roof of the inner bonnet and the carrying hook of the lamp is provided a disk of non-conducting material, whereby the said hook is always kept perfectly cool and so rendered capable of being handled'with ease.

A form of construction comprises a hooded outer bonnet whose dimensions are such as to pass downward over the inner bonnet and leave an annular space between the cylindrical walls of said bonnets and also leave a space between their upper cap portions, while in the space so provided between the cap portions of the two bonnets is fitted a disk of asbestos or other non-conducting material. The outer bonnet and the non-conducting disk are both secured to the roof of the inner bonnet, while the lower edge of the said outer bonnet is left entirely open for the passage of air to the annular space between the inner and outer bonnets, where it circulates and then passes out by way of apertures formed in the hood of the outer bonnet, through which apertures the products of combustion from the lamp are also caused to pass out. The ring of the carrying hook of the lamp is attached to the hood of the outer bonnet, and the disk of non-conducting material situated between the hoods of the two bonnets thus has the effect of insulating the said ring from the hood of the inner bonnet and of thus keeping it perfectly cool. in another construction, the outer bonnet might be attached to the frame of the lamp around the base of the inner bonnet but insulated therefrom, in which case air-admission apertures would be formed in the said outer bonnet near its base, while the upper end of the said bonnet would be left open so as to allow air to circulate between the two bonnets and pass out at the upper part of the said outer bonnet; the products of combustion from the lamp being also passed out at the same exit. In this construction, the ring of the carrying hook of the lamp would be attached to a plate insulated from the inner bonnet of the lamp by a disk of non-conducting material in a similar manner to that described with reference to the previous example of con struction.

The accompanying drawings show an example of construction of my invention applied to a miners safety lamp, wherein Figure 1 is a part sectional side elevation and Fig. 2 is a sectional plan taken on the line A, B of Fig. 1.

Referring to the drawings, the ordinary hooded bonnet 1 of the lamp is fitted with a hooded outer bonnet 2 arranged concentrically therewith so as to leave an annular space 3 between the cylindrical walls of the two bonnets l, 2 extending the full depth thereof, which bonnets 1, 2 are insulated from each other by means of a disk 4 of asbestos or other non-conducting material inserted between the cap portions of the said bonnets 1, 2. The non-conducting disk 4 is secured to the roof of the inner bonnet l by rivets 5, while the fixing stud 6 of the carrying hook 7 of the lamp is passed through acent'ral hole 8 in the''ap portion of the outer bonnet 2 and into suspending engagement withthe non-conducting disk 4 1, 2 by way of the annular space 3, which arrangement, in conjunction with the fact that the two bonnets 1, 2 are insulated from each other by the disk 4: of non-conducting material, renders the outer bonnet 2 perfectly cool at all times; while the said insulating disk 4, by surrounding the fixing stud 6 of the carrying hook. 7 has the further effect of always keeping the said hook perfectly cool. In this way, the bonnet 2 of the lamp and also its carrying hook 7 are rendered capable of being handled without discomfort even after the lamp has been lighted for a considerable period, and thus the disadvantages first herein referred to are entirely obviated.

What I claim as my invention and deslre to secure by Letters Patent is 1. In oil-illuminated miners safety lamps of the shielded type; the combination with the ordinary bonnet of the lamp of an inclosing or outer bonnetof such an increased diameter as to leave an annular space be tween the two, the said outer bonnet being left open top and bottom so as to allow atmosheric air to circulate freely through the space between the two bonnets by which the outer bonnet itself is always kept perfectly cool and so rendered capable of being handled without discomfort. V V

2. In oil-illuminated miners safetylamps of the shielded type; the combination with the ordinary bonnet of the lamp of an inclosing or outer bonnet insulated therefrom and"being"'dist'anced apart so as to leave an annular space between the two, the

said outer'bonnet being-left open top and bottom so as to allow atmospheric air to circulate freely through the space between the two bonnets by which theouter bonnet ing material inserted between theircap por-' tions which also insulates the carrying hook of the lamp from the inner bonnet, the said outer bonnet being distanced from the inner bonnet and being left open top andbottom so as to allow atmospheric air to circulate through the'space betweenthe two bonnets by which the outer bonnet itself is always kept perfectly cool and so renderedlca'pable of being handled without discomfort.

4;. In oil-illuminated miners safety lamps of the shielded type;thecombinationwith the ordinary bonnet of the'lamp ofan inclosing or outer bonnet insulated therefrom and being distanced apart so as to leave an annular space between the two, the said outer bonnet being left open top and bottom so as to allow atmospheric air to circulate freely through the space between the two bonnets by which the outer bonnet itself is always kept perfectly cool, and a disk of non-conducting material situated between the cap portion of the inner bonnet'and the carrying hook for insulating the latter from the lamp.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

WILLIAM BEST.

Witnesses:

J OHN J own'r'r, NELLIE KNAPToN.

Copies of this patent may be obtained for five cents each, by addressing the Conimissioner of Patents, Washington, D. 0. 

